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Dec 04, 2012· ball mill foundation design. ... work of a ball mill. . solutions to SAG mill power and feed problems. As an example, . for overall design of the motor, mill and foundation to ... Antamina – SAG Ball Mill Gearless Drives Stators Fig. 3: Dominant Mode of Stator Vibration (SAG Mill)
MC''s scope of work comprised the installation of stator quadrant windings on the four mill motors, which were manufactured by Siemens. The four motors are Gearless Mill Drives (GMD), also known as wraparound motors, and include two 26 MW ball mill motors and two 28 MW SAG mill motors.
Oct 02, 2014· The Stator Behaviour. The Cadia SAG mill diameter is 40 ft and the ring motor that drives the mill is rated at 20 MW. In 1998 when the mill and motor were commissioned both were the largest machines of their type in the world. The stator exhibited vibration excursions that appeared to be related to the mill speed.
Description: 13 ft diameter Allis Chalmers grinding mill configurable as ball or SAG mill – Shell cut into multiple sections for transport, can be fit to desired length – Falk Gear single helical 257 teeth with 38″ face width very little use in excellent condition – Pinion: 21 tooth good condition with bearings – High speed coupling – New gear spray lubrication system, Farval type ...
In June 1998, the world''s largest grinding mill, the 40 ft ( m) diameter 20 MW Cadia gearless SAG mill, was commissioned. This was a leap of over 40% above the largest operating SAG mill. A significant saving in capital cost gave the incentive necessary for a single mill line at Cadia, resulting in the selection of the 40 ft ( m ...
Evaluation of synchronous motors on grinding mills. ... retrofitting a SAG Mill with new contro l was a major ... The stator flux equations are used to identify the crosscoupling occurring ...
Sep 17, 2013· Forum » General Discussion » Starter of SAG Mills with rotor resistance. Topics: Starter of SAG Mills with ... The line commutated inverter is connected to the same feeder that suplies power to the stator, ... I expect that this type of drive would be the most common large mill variable speed mill drive in the world''s minerals processing ...
ABB Gearless Mill Drives Motors Drives (Minerals Solutions) The wrap around motor is designed with socalled Roebel bars for the stator ... Conga: The world''s first 42foot diameter 28 MW gearless SAG mill (English pdf...
Reference Rok Zákazník Popis Hmotnost Výběr z již realizovaných zakázek 2017 ABB Mounting block V3200; 3 sets 225 t Foto 2017 Andritz Hydro Stator frame 25,4 t Foto 2017 Maguin ... SAG mill .
The acoustic sensors are one of the components of the monitoring system on grinding machines. They check the noise issued at the point where the part or dresser touch the grinding wheel. The wide range of acoustic sensors can be applied to grinding machines for internal or external grinding, grinding without centres, grinding for planes, grinding for gears or tools, resolving the most ...
Mills and GMDs Maarten van de Vijfeijken* looks at large, larger and the largest units in grinding ore ... GMD for the world''s first 42'' SAG mill for the Minas Conga oxide gold copper project in Peru. ... After installation, the stator of a 40'' SAG mill is over 21 m high OCTOBER 2010 International Mining 31 INNOVATION NEWS.
drive stator for SAG mill 12 Ball mill 2 (with stator) and Ball mill 1 . RECENT DEVELOPMENTS – WORKSHOP Early occupation of mine maintenance workshop by the operations team took place in midJanuary Other mining support facilities will be progressively occupied in March 2015 13
ABB''s GMD is the most powerful mill drive system in the market to power semiautogenous (SAG), ball and autogenous (AG) mills, This ''workhorse'' for grinding operations combines a robust, servicefriendly and fit for purpose design to provide highest throughput, reliability .
The company selected ABB''s 26 MW gearless mill drive system (GMD) for the mine''s 40 ft SAG mill, as well as other drives, electrical infrastructure equipment and a longterm service agreement (LTSA). This is expected to reduce operating costs, improve process throughput and reliability while saving energy and keep equipment in top form.
SAG Mill Control: It Shouldn''t be that Hard An economically appealing method for improving operations is available without the capital expense — get more out of a mill by applying the advanced control capabilities in the existing plant control system By Andrew Thornton
Autogenous mills, semiautogenous mills and ball mills for wet grinding. A company of Polysius ThyssenKrupp ... driven SAG mill for gold ore grinding. SAG and ball mills for comminuting gold/ ... of motor stator and motor poles, which are attached to the mill shell. Drive motors
"Loose stator coils in synchronous motors will generate fairly high vibration at Coil Pass Frequency (CPF) which equals the number of stator coils x RPM (# Stator Coils = Poles x # Coils/Pole). ... When the Sag Mill was in operation the clutch operation just did not look ok and pad wear was uneven.
Gearless Warp Around SAG Mill. Previous Next ... The single largest pieces were the two statorhalves (55 to each), which could be handled by the existing mill service stator was assembled infront of the partially completed mill body on its sliding foundation. The 14 rotor segments were installed onebyone on the mill body (which ...
Abstract: Typical drive configurations of highcapacity SAG mills use a twostatorwinding vectorcontrolled synchronous motor, with a 30° shift between the two windings, fed by a twosecondary deltadeltawye power transformer and two sixpulse cycloconverters. This paper presents and evaluates three different modeling options for the SAG mill drive.
Sep 23, 2014· Grinding Mill Foundations admin 23 September 2014 2014, Design ... Another interesting foundation we studied is the Fimiston SAG mill foundation. ... The El Teniente SAG mill foundations had to be stiffened as did the stator frame to ensure there would be no vibration because the soil properties were very poor. Foundations cannot be built on ...
ABB Completes OnSite SAG Mill Motor Rewind at ndida Copper, Wins Service Contract at Goro Nickel Project. ABB recently announced that rewinding of a SAG mill stator at Chile''s Minera ndida—the world''s largest copper mine—was successfully completed, marking the first time in 40 years of gearless mill drive (GMD) history that the company has performed a stator rewind onsite.
Baden, Switzerland, September 8, 2009 – ABB, the leading power and automation technology group, announced that the rewinding of the SAG mill stator of Minera ndida, the worlds largest copper mine, has successfully been completed. The rewinding was done onsite and completed ead of .
The Ernest Henry SAG mill (11 MW) is currently the largest twin pinion single drive mill installed in Australia. Problems have been experienced with the twin pinion drive at Fimiston and with the ring motor at Cadia. At Cadia, excessive vibration and deflections in the drive stator were encountered during
ABB''s new Gearless Mill Drive generation: Maintenancefriendly features raise availability and productivity Axel Fuerst, Reinhold A. Errath, Sebastian Gaulocher ... The whole stator bar is "VPIed" including the slot ... SAG Mill Figure 2 Core ...
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